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Source code for sympy.concrete.simplification

""" Change index / Reorder / Reverse order of limits of Sums and Products"""fromsympy.concreteimportProduct,SumfromsympyimportSclassReorderError(NotImplementedError):""" Exception raised when trying to reorder dependent limits. """def__init__(self,expr,msg):super(ReorderError,self).__init__("%s could not be reordered: %s."%(expr,msg))